CVE-2021-45884: Brave

High severity, CVSS 7.5. EPSS: 3.1% chance of exploitation in the next 30 days.

In Brave Desktop 1.17 through 1.33 before 1.33.106, when CNAME-based adblocking and a proxying extension with a SOCKS fallback are enabled, additional DNS requests are issued outside of the proxying extension using the system's DNS settings, resulting in information disclosure. NOTE: this issue exists because of an incomplete fix for CVE-2021-21323 and CVE-2021-22916.

Affected products

• Brave Brave: from 1.17.1, up to and including 1.33.106

Published 2021-12-27. Last modified 2026-06-17.